/**
 * Copyright 2010 Neuroph Project http://neuroph.sourceforge.net
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.neuroph.core.input;

import java.io.Serializable;
import java.util.List;
import org.neuroph.core.Connection;

/**
 * Performs min function on input vector
 *
 * @author Zoran Sevarac <sevarac@gmail.com>
 */
public class Min extends InputFunction implements Serializable {

    /**
     * The class fingerprint that is set to indicate serialization compatibility
     * with a previous version of the class.
     */
    private static final long serialVersionUID = 2L;

    @Override
    public double getOutput(List<Connection> inputConnections) {
        
        if (inputConnections.size() == 0) return 0;
        
        double min = inputConnections.get(0).getWeightedInput();

        for (Connection connection : inputConnections) {
            min = Math.min(min, connection.getWeightedInput());
        }
        
        return min;
    }
}
